3.23.1 html 34 23 1 false 9 0 false 2 false false R1.htm 995100 - Document - Cover Sheet http://xbrl.sec.gov/dei/role/document/Cover Cover Cover 1 false false R2.htm 995410 - Disclosure - Pay vs Performance Disclosure Sheet http://xbrl.sec.gov/ecd/role/PvpDisclosure Pay vs Performance Disclosure Notes 2 false false All Reports Book All Reports tm231853d2_def14a.htm crl-20221231.xsd crl-20221231_def.xml crl-20221231_lab.xml crl-20221231_pre.xml bc_ceocomp-bwlr.jpg bc_netincome-bw.jpg bc_nongappeps-bw.jpg bc_tsr-bw.jpg ic_committe-bw.jpg ic_member-bw.jpg ic_tick-bw.jpg lc_crltsr-bw.jpg lc_peergroup-bw.jpg lg_charlesriver-4c.jpg pc_diverse-bw.jpg ph_craigthompson-bwlr.jpg ph_crichardreese-bw.jpg ph_deborahtkochevar-bwlr.jpg ph_georgellado-bwlr.jpg ph_georgemassaro-bwlr.jpg ph_jamescfoster-bw.jpg ph_martinmackay-bw.jpg ph_nancyandrews-bwlr.jpg ph_richardwallman-bwlr.jpg ph_robertbertolini-bw.jpg ph_virginiawilson-bwlr.jpg px_proxypg1-bw.jpg px_proxypg2-bw.jpg sg_jamescfoster-bw.jpg sg_matthewldaniel-bw.jpg http://fasb.org/us-gaap/2022 http://xbrl.sec.gov/dei/2022 http://xbrl.sec.gov/ecd/2022q4 true false